Airborne geophysical survey: Bolivar-Strafford area, Missouri

Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. In the earlier days of surveying, the only way to represent this data was to generate an analog map with contour lines. This dataset is a representation of the digitized contour lines either by following the lines or by choosing the intersection of the contour and flight-line to create a value of the magnetic field. The values presented are latitude, longitude, and map magnetic-field values.航空磁测数据（Aeromagnetic data）由机载仪器沿飞行航线采集，采集过程中同步记录磁场强度与测点地理位置。在航空磁测工作初期，此类数据唯一的可视化表达手段为绘制带有等值线的模拟地图。本数据集是对数字化等值线的呈现，可通过沿等值线追踪或选取等值线与飞行航线的交点来获取对应的磁场数值。本次公开的数据包含纬度、经度以及航磁图磁场数值。